//
//  UserAccount.swift
//  weibo117
//
//  Created by 宋禹奇 on 15/6/27.
//  Copyright © 2015年 宋禹奇. All rights reserved.
//

import UIKit

class UserAccount: NSObject,NSCoding {
    //用于调用access_token，接口获取授权后的access token
    var access_token: String
    //access_token的生命周期，单位是秒数(实际是数值！)
    var expires_in: NSTimeInterval
    
    //过期日期
    //程序创建人有5年有效期，普通用户有效期三天
    var expiresDate: NSDate
    //当前授权用户的UID
    var uid: String
    //友好显示名称
    var name: String?
    //用户头像地址（大图），180×180像素
    var avatar_large: String?
    

    init(dict: [String: AnyObject]){
    
        access_token = dict["access_token"] as! String
        
        expires_in = dict["expires_in"] as! NSTimeInterval
        
        uid = dict["uid"] as! String
        
        //计算过期日期
        expiresDate = NSDate(timeIntervalSinceNow: expires_in)
    
    }
    
    //加载用户信息
    func loadUserInfo(finished: (account: UserAccount?,error:NSError?) -> ()){
    
        let params = ["access_token":access_token,"uid":uid]
        
        NetworkTools.sharedNetworkTools().GET("2/users/show.json", parameters: params, success: { (_, JSON) -> Void in
            
            let dict = JSON as! [String : AnyObject]
            
            self.name = dict["name"] as? String
            
            self.avatar_large = dict["avatar_large"] as? String
            
            //保存用户信息
            self.saveAccount()
            
            //通知调用方处理完成
            finished(account: self, error: nil)
            
            
            }) { (_, error) -> Void in
                
                finished(account: nil, error: error)
                
        }
        
        
    }
    
    
    //打印对象信息
    override var description: String{
        let properties = ["access_token", "expires_in", "uid","expiresDate","name","avatar_large"]
        
        return "\(self.dictionaryWithValuesForKeys(properties))"

    }
    
    //设置归档路径
    static let accountPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!.stringByAppendingPathComponent("account.plist")
    

    //保存信息
    func saveAccount(){
        print(UserAccount.accountPath)
        
        NSKeyedArchiver.archiveRootObject(self, toFile: UserAccount.accountPath)
    
    }
    
    //加载信息 注意：如果之前没有归档，可能会返回 nil
    class func loadAccount() -> UserAccount? {
        print("加载用户账户")
        // 判断 token 是否已经过期，如果过期，直接返回 nil，进入登录界面
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(accountPath) as? UserAccount{
            
            // 判断日期是否过期，根当前系统时间进行`比较`，低于当前系统时间，就认为过期
            // 过期日期`大于`当前日期，结果应该是降序
            if account.expiresDate.compare(NSDate()) == NSComparisonResult.OrderedDescending{
            
                return account
            }
        
        }
        return nil
    }
    
    
    //解档
    required init?(coder aDecoder:NSCoder){
    
        access_token = aDecoder.decodeObjectForKey("access_token") as! String
        
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        
        expiresDate = aDecoder.decodeObjectForKey("expiresDate") as! NSDate
        
        uid = aDecoder.decodeObjectForKey("uid") as! String
        
        name = aDecoder.decodeObjectForKey("name") as? String
        
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
    
    }
    
    
    //归档
    func encodeWithCoder(aCoder:NSCoder){
    
        aCoder.encodeObject(access_token, forKey: "access_token")
        
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        
        aCoder.encodeObject(expiresDate, forKey: "expiresDate")
        
        aCoder.encodeObject(uid, forKey: "uid")
        
        aCoder.encodeObject(name, forKey: "name")
        
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        
    
    }
}
